clang moved in Xcode 4.3

[Joshua Root]

On 2012-2-18 13:17 , Jack Howarth wrote:
>    It appears that the following change will be required for Xcode 4.3 in port's
> /opt/local/share/macports/Tcl/port1.0/portconfigure.tcl due to the fact that clang/clang++
> only resides in /usr/bin now....

It doesn't only reside in /usr/bin, and in fact jberry already updated
trunk to use the output of `xcrun -find clang`. I am now thinking that
continuing to require the Command Line Tools and using /usr/bin would be
the better idea though.

- Josh